7. In the expression –7x – 5x2 + 5, what is the coefficient of x?
7
5
–5
–7
8. Write the expression using a single exponent. 2^2 • 2^8
4^10
2^10
4^16
2^16
9. Write the expression using scientific notation. (2.5 • 104)(4 • 103)
10 • 10^7
10 • 10^8
1 • 10^8
10• 10^12
My answers:
7. 5
8. 2^10
9. 10 • 10^7
Your #7. is wrong
No. 9 could also be 1*10^8, but it should have two significant figures, as your answer does.
Can you explain #7 please
Sure. The coefficient of x is the multiplying factor that appears on front of x.
In this case, it is -7
Oh ok! Thanks for explaining!
what the answer to 5x8=(5x2)+(5x
So mean!
how old are u guys
got a 69 on this test;-; but the answers are.
1: one square 2 lines and the mini squares shaped like an L
2: 5f^2+11f-2
3: -5x^2+8x+2
4: -3x^2-x-5
5: 13x+2
6: -3x^2-13x-5
7: -7
8: 2^10
9: 1*10^8